package com.neu.edu.controller;


import com.neu.edu.interceptor.CartInterceptor;
import com.neu.edu.service.CartService;
import com.neu.edu.to.UserInfoTo;
import com.neu.edu.vo.Cart;
import com.neu.edu.vo.CartItem;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.util.List;
import java.util.concurrent.ExecutionException;


@Controller
public class CartController {

    @Autowired
    private CartService cartService;

    @ResponseBody
    @GetMapping("/currentUserCartItems")
    public List<CartItem> getUserCartItems(){
        return cartService.getUserCartItems();
    }


    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId){

        cartService.deleteItem(skuId);

        return "redirect:http://cart.gulimall.com:8081/cart.html";
    }

    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId") Long skuId,@RequestParam("num") Integer num){

        cartService.changeItemCount(skuId,num);

        return "redirect:http://cart.gulimall.com:8081/cart.html";
    }

    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId,@RequestParam("check") Integer check){

        cartService.checkItem(skuId,check);

        return "redirect:http://cart.gulimall.com:8081/cart.html";
    }

    /**
     * 浏览器中保存有一个cookie：user-key,用来标识用户的身份，一个月后过期
     * 如果第一次使用jd的购物车功能，都会给一个临时的用户身份
     * 浏览器保存以后，每次访问都会带上这个cookie
     *
     * 登录：session有
     * 没登录： 按照cookie里面带来的user-key来做
     * 第一次，如果没有临时用户，帮忙创建一个临时用户
     *
     * @param
     * @return
     */
    @GetMapping("/cart.html")
    public String cartListPage(Model model){

        // 快速获取到用户的信息  用户的id或者user-key
//        UserInfoTo userInfoTo = CartInterceptor.threadLocal.get();
//        System.out.println(userInfoTo);
        Cart cart = null;
        try {
            cart = cartService.getCart();
        } catch (ExecutionException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        model.addAttribute("cart",cart);

        return "cartList";
    }

    /**
     * 添加商品到购物车
     *
     * RedirectAttributes attributes：
     *              attributes.addFlashAttribute() 将数据放在session里面，可以在页面取出，但是只能取一次
     *              attributes.addAttribute("skuId",skuId); 将数据放在url后面
     * @return
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId, @RequestParam("num") Integer num, RedirectAttributes attributes){

        try {
           cartService.addToCart(skuId,num);
        } catch (ExecutionException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        attributes.addAttribute("skuId",skuId);

        return "redirect:http://cart.gulimall.com:8081/addToCartSuccess.html";
    }

    @GetMapping("/addToCartSuccess.html")
    public String cartSuccessPage(@RequestParam("skuId") Long skuId,Model model){
        // 添加商品到购物车后，重定向到成功页面，再次查询购物车数据即可
        CartItem item = cartService.getCartItem(skuId);
        model.addAttribute("item",item);

        return "success";
    }

}
